Double well jar



FIG. 1 is a side view of a double well jar;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof; and,

FIG. 4 is a side view of the double well jar of FIGS. 1-4 with the caps removed.

The evenly-dashed broken lines in the drawings illustrate the portions of the double well jar that form no part of the claim. 

CLAIM We claim the ornamental design of a double well jar, as shown and described. 